Simposlum Sumber Atom Kabano>oan Pertatna (Julal 1992) FSSA UKM KAMPUS SABAH (MAKltAt, U, Jllld 1: 137 - )ii)

P r o t ld ln g

CONFLICT BETWEEN INDUSTRIAL GROWTH AND WATER SUPPLY PRESERVATION : CASE STUDIES IN MALAYSIA

Maketab Mohamed

Faculty of Chem ical and N atural Resources Engineering Unlverslti Teknologl M alaysia

J a la n Sem arak 54100 Kuala Lum pur

A B ST R A C T

The industrial growth in M alaysia in the past decades has not only brought about economic success to the country but also the unwanted side-c ffect - environm ental pollution. Many M alaysian rivers being used fo r the public water supply are pollu ted because o f the location o f polluting industries upstream. In the long run, the public is at risk as the po llu tan ts not only degrade the physical water quality but the presence o f m icroorganism s and chem icals are liable to cause health problem s such as diarrhoeal diseases and cancer. There are many cases o f watershed mismanagement in areas o f high industrial growth in the country such as the watersheds o f Sungai Langat, Sungai Skudai, Sungai Linggi, Sungai Damansara and Sungai Buluh. The Slate Governments and other relevant authorities m ust be made aware o f these problem s and therefore can avoid fu tu re m istakes by planning the location o f fu tu re industrial estates with care.

abstrak

Pertumbuhan industri di M alaysia pada beberapa dekad yang lalu m embawa kejayaan ekonomi kepada negara tctapi dalam masa yang sama ia ju g a membawa satu kesan sampingan iaitu peneemaran alam sekitar. Banyak sungai-sungai di M alaysia yang m enjadi punca air minuman telah tercernar oleh kerana kedudukan kUang-kilang di hulu tempat pcngambilan air. Dalam masa jangka panjang. orang awam akan menanggung risiko kerana bahan-bahan peneemaran itu bukan sahaja boleh menimbulkan masalah estetik kepada air minuman tetapi pelbagai m ikroorganisma dan bahan kimia dalam a ir boleh mendatangkan masalah kesihatan seperti ceret-bcret dan barah. Beberapa kes pengurusan kawasan tadahan a ir yang lidak sempurna berlaku di beberapa kawasan perindustrian yang pesat seperti di kawasan tadahan air Sungai Langat, Sungai Skudai, Sungai Linggi, Sungai Damansara dan Sungai Buluh. Pihak kerajaan negeri dan pihak bcrkuasa tain perlit disedarkan tentang masalah tersebut dan dengan ini dapat menghindarkan kesilapan yang sama dengan merancangkan penempatan kawasan industri di masa depan dengan baik.

INTRODUCTION

As a tropical country, M alaysia Is blessed with p lenty of w ater year round. But as the coun try strives for developed country s ta tu s , m istakes have been made especially In locating of water polluting industries above w ater in takes point. Most of the avoidable m istakes have occurred in a reas of high industria l growth namely In the s ta te s of Selangor, Negeri Sem bllan, M elaka and Johore and therefore a t the same time areas which are densely populated and with high dem and for finished w ater.

T h is p a p e r Is a co m p ila tion of s h o r t researches and s tud ies carried o u t by the au th o r when working with the D epartm ent of Environment and the continuation of such w orks afte r Joining U niversitl Teknologl M alaysia.

MATERIALS AND METHODS

The m ajor rivers with in d u strie s located above w ater in takes which were stud ied are Sungai D am ansara , Sungai Skudai, Sungai Langat and Sungai Buluh. However, only th e f irs t th re e will be d isc u sse d extensively in th is paper. O ther th an w ater quality sam plings and analysis the stud ies

a lso en ta iled th e inventory of po llu ting s o u rc e s , sa m p lin g s o f e ff lu en t an d p inpoin ting th e ex ten t of illegal industries w ith in th e w atershed .

In situ read ing su ch a s for dissolved oxygen, tem pera tu re , salinity , conductivity, tu rb id ity and pH were carried o u t on site u s in g portab le e lectronic equipm ent. The dissolved oxygen m eter u sed w as a Yellow S p rin g s E q u ip m en t M odel YSI 58 , th e Salinity-Conductivlty and Tem perature Meter (SCT m eter) w as a n o th e r Yellow Springs Equipment (Model YSI 33). The turbtdMmeter u sed w as a HACH Model 16800, while the pH m eter w as HO RIBA Model 21. There w as a m inor d ifference for a n equ ipm en t used In U niversiti Teknologt M alaysia a s th e pH m eter u sed w as O rion R esearch Model SA 210.

G rab sam plings of river w ater a t the various stations were carried o u t for chemical ana ly sis a t th e laboratory . The types of bo ttle used an d the p reservatives added were in accordance with S tandard M esthods a n d /o r the recom m endations given by the C h em istry D e p a rtm en t, M alaysia . The ch em ica l a n a ly s is c a rr ie d o u t by th e C hem istry D epartm ent, Petaliing Ja y a and by the Environmental Engineering Laboratory a t U n iv ers iti T eknologl M alaysia u se d S tan d ard M ethods as th e m ain reference.

RESULTS AND DISCUSSION

C ase 1; S ungai D am an sara

Sungai D am ansara Is an atypical w atershed for a w ater supp ly source a s in stead of a protected forested area with clear unpolluted w ater. The w atershed includes a few of the m ost developm ent p a rts of Petaling Ja y a and a n exclusive housing a rea of K uala L um pur.

The w atershed includes trad itional M alay villages (Kam pung Sungai Penchala. Kampung Bukit Lanjan and Kampung Meiayu Subang), sq u a tte r com m unities (Kampung Sungai Kayu Ara, K am pung C em paka and K am pung S u n g a i R um put) a n d m odern to w n sh ip s (T am an T u n Dr. Ism ail,

S im p o s lu m S u m b tr A la m K a b a n g s o o n P w ia m a ( M o ! 1992)

fSSA V K M KAMPUS SABAH (M A K C T A t, U , J l l ld 2: 137 - 1M )

Prosiding

D am ansara U tam a, D am ansara Ja y a , SS2, Tam an Megah and T am an Mayang). The Kuala Lum pur In te rnationa l A irport and Rubber Research Institute of Malaysia (RR1M) with its rubber factory is also w ith in the w atershed. Major polluting sources include A1ROD which services a irc ra ft an d Is a possible source of oil an d grease pollution, petrol service s ta tio n s an d the pig-rearing industry a t K am pung B am Subang. A new p o llu tin g so u rc e of im p o rta n c e is th e controversial Petaling Jaya Municipal Council solid w aste d isposal s ite a t Kelana Ja y a . It does not fully practise the san itary landfill m ethod and becam e the source of local residen ts 'ire b ecau se of th e foul sm ell and housefly problem s. A tr ib u ta ry o f Sungai D am ansara, Sungai Kayu Ara flows a t th e edge of the dum p and receives foul smelling leachate especially after rainfalls. Analysts of leachate Indicated a high am ount of arsenic (0.58 mg/1) which is m ore th a n 10 tim es the am oun t of the heavy m etal allowed to be discharged upstream of a w ater supp ly in take point.

Sewage Is still th e m ajor co n trib u to r of pollution of the river a s m ost of the tow nships m entioned m ostly rely on sep tic and Imhoff tan k s for trea tm en t. There is ia sprinkling of oxidation ponds b u t even these do not comply with environm ental s tan d a rd s .

The w a te r in ta k e is c lose to the M ontfort Boys’ Home, B atu Tiga an d the w ater is treated a t the Bukit Je lu tong W ater T reatm ent P lan t before being d istrib u ted in parts of Shah Alam. There Is a possibility th a t th is w ater In take will be close due to the Increasing pollu tion levels b u t a t the tim e of the p repara tion o f th is paper, the trea tm en t p lan t a t B ukit Je lu to n g is still using raw w ater from S ungai D am ansara .

The data analysed which are presented In F igures I to 12 w ere from 5 sam plings of th ree s tudy s ta tio n s . S ta tion 1 Is on S ungai Kayu Ara a t th e bridge (Ja lan SS 25 /29 ) n ea r Tam an M ayang; S ta tion 2 is on Sungai D am an sara a t the bridge of the road tow ards the Selangor Shooting Club range and S ta tion 3 Is a b o u t 100 m eters above th e w ater in tak e .

S lm p o tlu fn Scim b » r A la m K o b a n o ia c n P o r ta m a ( M a i 1992) FSSA UKM KAfJPUS SABAH (M A K C T A I, U , J l l ld 2: I J 7 - l i t )

Prosldlng

G E 1

16/5/89 1/6/89

------ !------

7/7/89------ 1------22/8/39 14 /3 /90

Date of Samplings

0 0 BOD

Figure 1: Sungai Damansara; Value of DO (Dissolved oxygen) and BOD (Biochemical oxygen demand) at Station 1.

2 2 /3 /8 9 14/3/90

0

ib /5 /89 1/6/89 7 /7 /8 9

Date of Samplings

------------- 0 4 G -------------MBASFigure 2; Sungai Damansara; Value of O and G (oil and grease) and MBAS at Station 1.

TCC

& E.

cob

(M

PN/IO

Om

l)P r o t ld ln gS im p o iiu m S tim b a r A la m K » b a n g s a a n P » r la m a (J u la t >992)fSSA UKM KAMPUS SABAH (M A X IT A B , M , J ll ld 2: 1 t7 ■ I t i )

Dale of Samplings

------------- Ammomaca! Nitrogen ------------ Chloride

Figure 3: Sungai Damansara; Value of ammoniacal nitrogen and chloride at Station 1.

Date of Samplings

TCC -------------E.coii

Figure 4: Sungai. Damansara; Value of TCC (total choliform count) and E. colt for Station 1.

DO

4 BO

D (m

g/1)

PresidingSimposium Sombar A lam K ebangsaan Peitam a (Julol 1992)FSSA VKM KAMPUS SABAH (M A K fT A t. M, Jllld 2: 137 - H i )

Date of Samplings

-------------- 04 G — ---------- MBAS

Figure 5: Sungai Damansara; Value of O and G (oil and grease) and MBAS at Station 2.

Dale o f Samplings

D O --------------BOD

Figure 6: Sungai. Damansara; Value of DO (Dissolved oxygen) and BOD (Biochemical oxygen demand) atStation 2.

P fo s ld ln gStmposttjm Sum bet Atom Kebangsaan P ertom a (Julai \992)fSSA UKM KAMPUS SABAH (M A K tT A t. M. Jllld 2: 137 - 16i)

Date of Samplings

Ammoniacal Nitrogen ------------ -- Chloride

Figure 7: Sungai Damansara; Value of ammoniacal nitrogen and chloridc at Station 2.

Date of Samplings

TCC ---------------k . c o 'j

Figure 8: Sungai Damansara; Value of TCC (total choliform count) and E. coli for Station 2.

Sitnposlum Sumbor Alam Kebangsaan Par lam a (Jutoi 1992) FSSA UKM KAMPUS SABAH (MAKE!AS, M, Jilld 2: 1S7 ■ H i )

Prodding

CjoCD

oo

Date of Samplings DO ------------BOD

Figure 9: Sungai Damansara; Value of DO (Dissolved oxygen) and BOD (Biochemical oxygen demand) at Station 3.

£

<£D5•ao

Date of Samplings

O&G ------------ MBAS

Figure 10 : Sungai Damansara; Value of O and G (oil and grease) and MBAS at Station 3.

TCC

& E.

coli

(MPN

/10

P r o t ld ln gSimpojftxn Sutnbar Alam K abongsaan Partam o (Ju lo l ) T OFSSA UKM KAMPUS SABAH (M A K IT A t . M , J l l ld 1: 137 - l i t )

Dale 01 Samplings

Ammoriiacal N i t r o g e n --------------- chtonde

Figure 11: Sungai Damansara; Value of ammoniacal nilrogen and chloride at Station 3.

Date of Samplings ------------- T C C -----------— Ecoli

Figure 12: Sungai Damansara; Value of TCC (total choliform count) and E. coli for Station 3.

ProtldlngS tm pos ium Sumbmr A to m K e h a n g s a a n P e r ta m a (J u la t 1992)fSSA UKM KAMPUS SABAH (MAKETA8. U , M M 2 : 13 7 - H i )

The results which show high am ounts of am m oniacal nitrogen, chloride and oil and grease, indicate th a t the river Is polluted m ostly in the form of organic po llu tan ts . High counts of fecal conforms indicate th a t the source of the organic pollutants is mostly of h um an or anim al origins b u t anim al husb an d ry is lim ited to poultry and pig farming activities a t Kampung Baru Subang.

It can be sum m erised th a t the major source of pollution is from the Sungai Kayu Ara sub-w atershed (Station 1) relative to the Sungai D am ansara sub -w atershed as shown is their respective resu lts . New projects w ithin the Sungai Kayu Ara sub- w atershed th a t will increase th e pollu tan ts load of Sungai D am ansara include the new township of Bandar Utama and the Troplcana G olf R esort. The developm en t of th e degazetted Sungai Buloh Forest Reserve into a large self-containing township in the next five y e a rs a lso will In crease th e to ta l po llu tan ts load of Sungai D am ansara. The form er forest reserve is d rained by th ree tr ib u ta r ie s of th e river nam ely S ungai R um put, Sungai Takil and Sungai Tam bul.

The quality of the river w ater a t the in take point canno t fully comply with the Class III category of the Interim Water Quality S ta n d a rd s for M alaysia e spec ia lly for am m oniacal n itrogen and fecal collforms. C lass HI is the least s tr in g en t for w ater supply which needs extensive trea tm en t.

Case 2: Sungai Skudai

S ungai S kudai Is a sm all river w ith a com paratively sm all w atershed s itu a ted In so u th e rn Jo h o r D arul Ta’zlm. The length of th e river Is ab o u t 47 km form its source in the Yule Catto oil palm esta te a t Sedenak to Its estuary In the S tra its of Johore (Selat Tebrau). The river is an Im portant w ater supply source for the Public Utilities Board. Singapore (PUB), with the w ater Intake and trea tm en t p lan t beside the Senal Highway before the Skudai township. The maximum capacity of the trea tm en t p lan t is ab o u t 40 mgd (million gallons per day) b u t It Is u sually processes only betw een 10 to 20 mgd. About 60 per cent of the finished w ater Is for the Jo h o r B haru residen ts.

PUB has been regularly com plaining abou t the Increasing deterioration of the raw water quality In the form of ammoniacal n itrogen (AN) and phenolic com pounds. Therefore, a special s tudy on the quality of the river water and the Inventory of major po llu tio n sou rces was ca rried o u t in November 1989. A nalysis of the raw d a ta o f the eight m onitoring sta tions w as also done so as to escerta ln the m ost polluted segm ents of the river. An au tom atic w ater sam pler was used to sam ple w ater a t the raw w ater Intake a t PUB for 24 hours. The samples were analysed for BODs (Biochemical Oxygen Demand for 5 days a t 20°C) and am m oniacal nitrogen.

The pollution problem of Sungai Skudai is trem endous because the w atershed la an Im portant developing a rea for Johore with a population of ab o u t 60.000 in five major townships and residential area (Kulal, Kulal Besar. Kulal Baru, Saleng dan Senal), an Industrial area (Senai Industrial Estate), an open solid w aste dum p, plg-farm s and mixed single in d u strie s (Figure 13). With the recen t economic upsw ing, the area Is se t for rapid developm ent as it will be receiving the growth spill over from the other surburb la surrounding Jo h o r Bahru. The growth. If no t In the Industria l sector, tends to be In the form of sup p o rt services such as residential a reas.

As in the case of m ost small townships in the country, the preferred m ethod of sewage trea tm en t in the Sungai Skudai w atershed Is by using sep tic and Imhoff tanks with a sprinkling of o ther m ethods such as oxidation ponds and activated sludge. The Infam ous “hanging" la trines b u ilt over d ra in s or s tream s are also used by some residen ts. The th ree pig farm s in the a rea do not have proper treatm ent facilities except for settling ponds.

Figures 14 to 21 Indicate th a t the w ater quality n ear the source a t Sedenak Is qu ite good a s the dissolved oxygen level (DO) Is high while o ther pollution indicator param eter such a s BODs, oil and grease, am m oniacal nitrogen and turbidity are low. The w ater quality changes for the worse w hen the river p a sse s th ro u g h d ra in s carrying effluents from factories and drains

Pro si d in gSim posium S u m ta r A lo m K e b o n g s o a n P o tta m o (J u lo i 1992)FSSA UKM KAMPUS SABAH (M A K S TA t, M , M id 2: 1 3 ? - U S )

Figure 13: Sampling stations in Sungai Skudai watershed

BOD

(mg/

l)

ProddingStmpotlum Sumb+f Alam Ktbanfftoan P fta m a (Jutal 1992)FSSA UKM KAMPUS SABAH (M A K H A t, M. Jllld 2: IS? - IM ) [ u t J

CkE

OO

D ista r/.e from E s lu a ry (km)

Figure 14: Sungai Skudai, Johor; Average concentration o f biochemical oxygen demand (BOD) and dissolved oxygen (DO), 1988.

Distance from Estuary (km)

Figure 15: Sungai Skudai, Johor; Average concentration o f biochemical oxygen demand (BOD) and ammoniacal nitrogen on 20/9/S6

Am

mon

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l N

itrog

en

img/

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Oxy

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(mg/

l)PiosldlngSim posium S v m b o i A to m K e b a n g s a a rt P a rta m a (J u lo t 1992) FSSA U K M KA M PU S S A B A H <M A K C T A I . M . J l l ld S : 137 - I S i )

Distance from Estuary (Km)

Figure 16: Sungai Skudai, Johor; Concentration o f dissolved oxygen (DO) from 8/11/89 to 9/11/89

Distance from Estuary fun)

Figure 17: Sungai Skudai, Jobor; Average concentration of oil and grease, 1979

17.71 21.74 24.31 28.50 30.91 3 3 .9 / 38.80 4!>,00

Distance Iroin Estuary (km)

Figure 18: Sungai Slcudai. Johor: Status of turbidity from 8/11/89 to 9/11/89

Distance Irom Estuary (kmi

Figure 19: Sungai Skudai, Johor; Status of pH from 8/11/89 to 9/11/89

PresidingSimpotlum Sombor A la m K a b a n gfa a n P w ta m a (Jvta l 1992)FSSA UKM K A M P U S S A B A H (M A K iTA B , M, Jllld 2: J J 7 - H i )

Year

Figure 20: Sungai Skudai, Johor; Trend o f biochemical oxygen demand (BOD) and dissolved oxygen (DO) from 1984 to 1988

Yeaf

Figure 21: Sungai. Skudai, Johor; Trend o f ammoniacal nitrogen and pH from 1984 to 1988.

DO

(mg/

l)

ProddingStmpotkm Sufnbm Alam K»bangtaan P i tamo (Jtja i 1992)FSSA UKM KAMPUS SABAH (M AK tTA t, M, Jllld 2: U 7 - 144)

from highly populated a re a s su ch a s Kulal w hich d ischarge poorly trea ted sewage and u n tre a te d su llage in to the river.

High am m oniacal nitrogen in the river especially du ring dry spells is unavoidable s ince m ajor sou rces a re from th e sem i­trea ted sewage, p ig-w astes an d a n u m b er o f rubber and palm oil factories. The results of the 24-hour m onitoring a t the PUB w ater in take show a relatively high am o u n t of am m oniacal n itrogen especially a t 12:40 a.m . on November 10, 1989 even though it was the rainy season. Phenolic compounds can be em anated from organic po llu tan t s im ila r to the so u rc e s o f p o llu tio n for am m oniacal n itrogen especially from palm oil m ills b u t d irec t pollu tion from a few textile industries and an optical lens grinding factory a re a lso possible.

Both ammoniacal nitrogen and phenolic co m p o u n d s ca n c a u se w a te r tre a tm e n t p rob lem s. A m m oniacal n itrogen form s m onochloram ines and dichloram ines w ith ch lo rine, depriving the fin ished w ater of th e n e c e s sa ry re s id u a l c h lo rin e w hile p heno lics form ch lo ropheno ls a lso w ith chlorine, causing noxious sm elling drinking w ater.

The w ater quality of Sungai Skudai will never take a tu rn for the b u tte r un less d ras tic actions are taken su ch as providing better sewage treatm ent for all the townships, closing down the pig farm s and enforcing m ore s tr in g en t s ta n d a rd for th e factories.

Case 3: Sungai L angat/Sungai Sem enylh

Sungai Langat is a very im portant watershed w hich supp lies w ater to m ost of the Klang Valley. T here a re two m ajor dam s for controlling the water flew of the river. These a re th e Langat and the Sem enylh dam s. O n the Sungai Langat, there are three major w ater in takes and one on Sungai Semenylh before its confluence w ith Sungai Langat. The la s t one is the b iggest Sm aller in takes and plants are also operational on the smaller tr ib u ta r ie s of Sungai Langat including the one on Sungai B atang Nllai n ea r Salak.

W hile the u p p e r reaches of Sungai Semenylh and Sungai Langat above the dams a re forested, u n popu la ted and unpo llu ted area, the w atershed below the dam s onwards to the water intake points are with population. There a re trad itio n al villages w ith ru b b er and fru it p lan ta tio n s , sm all tow ns p lus several industrial estates. Within the sungai Uangat watershed, there are industrial areas a t the n in th mile C heras, Inch K enneth / Balakong industrial Estate, Kajang Industrial Area and Bangt Industria l Area (Figure 22).

Meanwhile the Sungai Semenylh water ca tchm en t h as Sem enylh an d B eranang Industrial Estates as well a s the fast-growing Nllal Industria l E s ta te in the neighboring s ta te of Negeri Sem bilan . T here a re a lso num erous individual factories m anufacturing a variety of products from both w atersheds. Appendix III lists o u t the various industries in th e Sungai L an g a t/S u n g a i Sem enylh w atershed .

As show n In F igures 23 to 32 the levels of organic pollu tant as m easured using th e B iochem ical Oxygen D em and (BOD) indicated th a t Sungai Langat w as qu ite polluted especially as drinking water. Tables1 to 5 indicate the resu lts of the chem ical an a ly s is of sev era l In d u s tr ie s ’ e fflu en t d ischarged in to S ungai Langat an d Sungai Sem enylh. The nam es of the industrie s a re n o t revealed a s to avoid possib le legal com plications. The m ost denom inator was th a t the Industries a re no t com plying with S tandard A of th e Third S chedule of the E nv iro n m en ta l Q u a lity (Sewage and In d u s tr ia l E ffluents) R egu la tions, 1979 (Appendix 1). Most Industries were not complying with the organic p a ram ete r of Biochemical Oxygen D em and (BOD) and Chem ical Oxygen D em and (COD). Lead, which is im portant in public considerations was 7 to 100 times higher than the stipulated standard. The culprit is a well known battery m an u fac tu rer. D ischarge form a glove making factory was high for both the organlcs and zinc, while two textile p la n ts effluent was high in organic w astes, oils and grease and phenol.

PtotidlnQSlmposltjm $umb*{ Atom Kabongsaan Pftam a (Jukjt J993) FSSA OKU KAMPUS SABAH (MAKtTAt, «, Jllld t : 137 • H i)

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1 CHERAS2 INCH KENNETH3 K A JA N G

4 BANG!5 SEMENYIH6 BERAN&NG7 N IL A !

Figure 22: Bukit Tarapoi waterworks catchment area

Stmpostum S om bw Alam K»bang$aan P*rtom o (Jolot 1992) FSSA UKM KAMPUS SABAH (UAKlTAt, M. Jllld 3: 137 ■ H i )

Prodding

■&E

CQ•8ooCO

Oengkil

Distarvce from estuary ( k m )

Kajang Bt. 18

Figure 23: Sungai Langat water quality, 1985 (Biocbcmica! oxygen demand [BOD] and Dissolved oxygen[DO])

Dengkil

Distance from estuary(km)

Kajang Bt. 18

Figure 24: Sungai Langat water quality, 1986 (Biochemical oxygen demand {BOD] and Dissolved oxygen[DO])

Smpoilum Somb*r Alam K tbanotaar Ptrlom a (Jutaf } 992) FSSA UKM KAMPUS SABAH (MAKlTAt, M. Jllld 2: 137 - H i )

Prodding

Distance from estuory(km )

Kajang Bt. 18DengkilFigure 25:Sungai Langat water quality, 1987 (biochemical oxygen demand [BOD] and dissolved oxygen

IDO])

Distance from estuary (km )

Kajang B1.18Dengkil

Figure 26: Sungai Langat water quality, 1988 (biochemical oxygen demand [BOD] and dissolved oxygen[DO]

©

63.43

Dengkil

81.14 86 94 93.38

Distance from estuary (ken)

Kajang

113.99

B t. 18

Figure 27:Sungai Langat water quality. 1089 (Biochemical oxygen demand [GOD| and Dissolved oxygen [DO])

o>Emin

DengkilDistance from estuary (km )

Kajang Bt. 18

F ig u re 28: S u n g a i L an g a t w a te r q u a l i ty , J9 8 5 ( a m m o n ia c a l n i t ro g e n [A N ] a n d s u s p e n d e d so l id s [S S ] )

Pro s id in gS m p o « u m S u m b a r A lo m K a b a n g s a a n P a n a m a (J u la i 1992)fSSA UKM KAMPUS SABAH (MAKETAB, M, M id 2: 1 3 7 - I Si I

Distance from estuary (km)

Dengkil Kajang 05- 18

Figure 29: Sungai l.angat water quality, 1986 (ammoniacal nitrogen [AN} and suspended solids [SS])

Distance from estuary (km)

Dengkil Kajang

Figure 30: Sungai Langat water quality, 1987 (ammoniacal nitrogen [AN] and suspended solids [SS])

SS

(mg/

l)

63.43 81.14 86.94 93.38 113.99

Distance from estuary (km)

Oengkil Kajang Bt. 18

Figure 31: Sungai Langat water quality, 1088 (ammoniacal nitrogen [AN] and suspended solids {SS])

Distance from estuary (km)

Dengkil K a ian9 B t 18

Figure 32: Sungai Langat water quality. 1989 (ammoniacal nitrogen [AN] and suspended solids [SS])

Pro si dingSlmpoiium Sumbei Alam Kabangsaan Pertoma (M a i I9V2) FSSA UKM KAMPUS SABAH (MAK17AB, M. Jilid 2: I i 7 - 166)

Other Present and Future Polluted Water C atchm ent Areas

T he rivers d isc u sse d a re som e of the problem atic w atersheds a t the present time b u t there are m any rivers th a t can be categorized as such and there are m any potential w atersheds th a t m ight be added to the list un less som e action Is taken.

One of the well known problem atic rivers Is Sungai Linggi In Negeri Sem bilan which includes the sta te capital, Serem ban. Its suburbs and most of the state 's industries in Its w atershed . The raw w ater supply a t its Intake is usually high in the organic content and the finished water noxious bu t th in g s a re im prov ing w ith th e fu tu re cen tralised sew erage system for the city and more advanced w ater trea tm en t with the Incorporation of the ozonation technology.

Sungai Buluh in the sta te of Selangor is a n o th e r po llu ted raw w ater supp ly . H ousing e s ta te s and various developm ents

such as in d u strie s and the construc tion of the Klang-Rawang highway rendered the water quality poor, w ith trem endously high suspended solids and organic constituen ts. At the tim e of the w riting of th is paper the w ater Intake a t Paya J a ra s is closed and Is to be used only for tra in in g purposes.

F u tu re problem s re la ted to w ater supply will be concen tra ted In the various s ta tes with high developm ent poten tial. Sungai Selangor is a river th a t may be polluted in the fu tu re a s the Selangor slate governm ent is keen on locating various industries in Its w atershed . The decision may Jeopardize the Sungai Selangor W aler Scheme which Is not yet in operation .

In Johore state , the unchecked growth of waler polluting Industries w ithin sensitive water catchm ent a reas will cause problems to this highly industrialized sta te . The best strategy- for any sensitive w ater ca tchm ent It to ensure th a t only compatible Industries are allowed to operate In It.

Tabic 1 : Results of chemical analysis for effluent receiving waters: Si;. Langat (Battery factory. Kjwjsjii PciinUu.-Lii.iii Balakong (LuJailg Inch Kenneth) Ulu Lanjat)

Dale I i / 1 1/87 ion i m 10/2/88 5/4/88 I2/5/8S

Parameter (MS| (I KM) (JKM) (MS) (MS)

pH 5.5* 0.0* 6.0 3.0 7.9 4.3*Conductivity 3500 - 2600 2450 - -

b o d 5 3 <5 4 - 9.0 20COD 19 5 67* 10 14.0 40Suspended Solids 23 - 5 6 - -

Total Solids 3060 940 1780 1840 2410 2010Oil and Grease - . - 12* - -

Lead 2.40* 0.21 * 0.7* 2.1 * 0.16* 2.9*Zinc 0.34 - 0.1 0.5 - -

Iron 2.83* 0.11 0.3 6.1* 0.16 0.34Copper - - 0.5 0.1 - -

Sulphate - - 1000 890 - •

Chloride . - 9 15 - -

Nickel - . - - - -

Tin - - - - - -

Chromium (hexa) - • - - - -

Continuation of' Tabic 1

Table 1 : Results of chemical analysis for effluent receiving waters: Sungai Langat (Battery factory, Kawasan Perindustrian Balakotig (Ladang Inch Kenneth) Ulu Langat. Selangor D. I:.)

DateParameter

12/5/88 14/6/88 27/3/89(MS)

14/4/89(MS)

11/5/89 3/11/89

pH 4,4* 10.3* 3.0 o.4 7.6 7,1 6.9 2.1* 8.2 8.2 6,4 6.5 7.2Conductivity - 3250 3200 4500 - - . _ _ -b o d 5 105* - 20* 6 15 10 5 * - <5 5 5COD 280* 30 110* 90* 40 20 15 - - . 10 20 20Suspended Solids - 6 10 30 65 35 5 - - - _ - _Total Solids 1700 1700 1980 2980 - - . - . 1700 2100 2200Oil and Grease - - 15.4* 9 .6* - - ■ - . - _ - _

Lead 0.01 0.7* 10* 2.1* 5.85* 4.00* 0.75* 1.58* <0.01 <0.01 0.01 1.92* 1.30*Zinc - - 0.3 0.1 - - - - - - _ .Iron 1.0 0.4 1.7* 0.9 2.39* 1.38* 0.39* - - - 0.05 0.08 0.18Copper - - 0.2 - - - - - - - * - -Sulphate - 774 - - - - - - - - -Chloride 11.0 13.0

'

- - - - ■ ■

T otal ■ : 5000 g ln /day (S h o u rs ) atau 22 .727 lite r/d ay

F acto ry s ite is ab o u t 100 m eter from Sg. Langat.

N o tes: M S - P riva te L a b o ra to ry

* - N ot com p ly in g w ith S tandard A

Pfo

$ldln

gSim

posium

Sijmber

Alam

Kaban

gsoor} Pei tam

o (Julai

>992) I----------------------------------------------------------------------------------------------------------------------------------------------------

FSSA UKM

KAMPUS

SABAH (M

AK

ITA

B.

M.

Jitid 2:

137 ■

Hi)

15

9

Table 2: Result of chemical analysis for effluent receiving waters: Sungai Langat (Paper Mill, 72 miles off Jalan Sungai Cbua, Kajang, Selangor D, E.)

DateParameter

22/9/82 4/5/83 13/3/84 3/5/86 19/8/86 15/9/86 3/2/86 16/5/87 12/12/87 15/6/88

pH 6.2 8.5 4.1* 4.0* •4.8 4.1 5.2 6,6 6.4 5.8Conductivity 265 450 - - - - 1680 270 320 330COD 150* 300* 47* 22* 100* 36* 158* 450* 230* 85*BOD, 1170* 1180* 117* 64* 288* 288* 1115* . 345* 210*Suspended Solids 750* 940* 30* 105* 105* 230* - 200* 210* 20Total Solids 1080 1380 - - - - - 640 770 350Oil and Grease 20* - - - - - 3* .Zinc - - - - - - - - . 0.2Iron - - * ■ - - -

• 1.3

T o ta l : 4 ,5 0 0 cu b ic m e te r/d ay (2 4 /6 /8 ? )

N o tes: * - N o t co m p ly in g w ith S tandard A

Simposium S o m b er Atom Kobongsocjn P e rta m a (Ju la i 1992) FSSA UKM KAMPUS SABAH (MAKfTAB, M, Jilid 2: 13 / - t66)

Pro si d in g

Table 3; Results of chemical analysis for effluent receiving waters: Sungai Langat (Textile Mill, Sungai. Chua, 43007 Kajang, Selangor D. £.)

DateParameter

19/8/86(MS)

18/8/86(MS)

16/8/86(MS)

28/10/86(MS)

30/10/86(MS)

22/2/89(JKM)

pH 12.3* 12.7* 12.1*' 12.7* 12.6* 9.2*Conduclivity - - - - - 18500BOD, 588* 397* 284* 440* 517* 540*COD 3320* 2135* 1540* 1920* 1680* 2080*Suspended Solids 148* 120* - 52* 30 80*Total Solids - - - - - 5860Total Nitrogen - - - 28* - -

Oil and Grease 52* 24* 56* 33* 20* 50*Phenol 6.2* 2.5* 2.9* 4.0* 5.3* -

Nsnc* JKM - C hem istry Itoparffuen t, M alaysia

MS - P riv a te L abo ra lo ry

* - No I co m p ly in g w ith Standard A

Table 4: Results of chcinical analysis for effluent receiving waters: Sungai Langat (Rubber Glove Factory, Jin. 34A. Kawasan Perindustrian Balakong, Bt. 9, Cheras, Selangor Daru] Ohsan)

DaleParameter

2/12/86 10/3/87 25/6/87 14/4/87 3/12/87 28/1/88.......—

21/6/88

pH 6.7 6.9 8.1 6.9 6.6 6.9 7.1Conductivity 550 265 1900 960 430 190 245BOD, 13 20 650* 85* 245* 90* 50*COD 256* 1000* 1500* 350* 600* 165* 120*Suspended Solids 350* 1450* 550* 175* 1100* 760* 30Total Solids 5000 1660 2510 750 1620 - 200Nitrate Nitrogen 0.3 8.1 6.0 4.0 1.8 - 4.9Ammoniacal Nitrogen 3.9 3.6 43 4.8 3.6 3.4 3.1Oil and Grease . - - - - . 16*Nickel 0.05 - - - - - -Manganese 0.12 0.1 - - - - -Zinc - 5.0* 7.8* 4.3* 4.3* 1.5* 1.4*Iron - - - - 1.6* 1.1* 0.5Chromium - - - - 1.3* 0.2 0.1Sulphate - • - - - - 4.6

N oles: JKM - C h em is try D epartm ent* M alaysia

MS - P riv a te L abo ra to ry

* - N o t co m p ly ing w ith S tandard A

ProddingSiniposiwn S w n b ar Atom K e b v n g s a a n P e rta m u (Ju la i >992) FSSA M M KAMPUS SABAH ( M A K t tA l. M . Jilid 2; 137 - I 6 i )

Table 5: Results cif chemical analysis of water samples taken during a sanitary survey of Sungai Langat

* Factory

Bt. Tampoi Treatment Works

TextileFactory

Pupermill WoolenTextile

Date 10/10/89 11/10/89 11/10/89 11/10/89

Time of sampling 1045 [030 1150 1440(hours)

Parameter Unit

Dissolved Oxygen (in situ) mgl 1 5.4 4.2 . 3.0Temperature (in situ) "C 25.0 40.0 - 35.0Turbidity (in situ ) NTU 150 85 37 62Conductivity (in situ) u s 26 16500 - 700Salinity (in situ) ppt ■() 8 • '0pH (in siin) 6.09 12.66 3.67 7.91BOD5 (20 "C) m gl'1 2.6 - - -COD m g l 1 21.9 - 79.4 -Ammoniacal Nitrogen m g l 1 0.2 - 0.15 -Nitrate Nitrogen mgl ’ 0.46 - 0.04 -Phosphate mgl 1 0.10 - - -Suspended Solids m g l 1 208 - 33 -Dissolved Solids mgl 1 70 - 372 -Total Solids mgl 1 278 - 405 -Oil and Grease mgl 1 8.5 4.4 6.8 8.9Phenol m g l 1 <0.005 0.034 - <0.005Detergents (MBAS) m g l 1 - - 0.9 -Cd mgl 1 0.02 0.01 - -

Cr m g i 1 0 .0 1 - -1 e mgl 1 2.0 0.7 -

Pfr m gl'1 0 .0 1 0.04 -Ni mgl 1 0.01 - -

Zn mgL1 0.35 0.21 -

Notes: JKM - Chemistry Department, Malaysia MS - Private Laboratory * - Not complying with Standard A

ProsldlngSym posium S u m b e r A la m K e b a n g s a o n P e r to in o (J u la i 199?)FSSA UKM KAMPUS SABAH (M A K IT AS, M, J il id 2: 137 . H i )

C O N C L U S IO N

T h e m a r c h o f o u r c o u n t r y t o w a r d s a c h ie v in g d e v e lo p e d n a t i o n s t a t u s In l in e w i th t h e 2 0 2 0 V is io n is in e v i t a b l e . B u t to p r e v e n t a f i a s c o s i m i t a r to t h a t S u n g a i M e la k a , w e m u s t p r e v e n t u n p l a n n e d g ro w th w i th in w a te r c a t c h m e n t a r e a s e s p e c i a l l y w i t h w a t e r p o l l u t i n g i n d u s t r i e s . O t h e r w i s e , t h e w h o le c o n c e p t o f s u s t a i n a b l e d e v e l o p m e n t w ill be a m o c k e r y a n d a t t h e s a m e t im e t h e h e a l t h o f t h e m o s t i m p o r t a n t r e s o u r c e o f o u r f u t u r e - o u r p e o p l e , w ill b e e n d a n g e r e d .

REFERENCES

Makctab Mohair.ed. 1990. River Pollution and the Urbanization of the Klang Valley, International Symposium on Urban Planning and Storm water Management, May 29 - June 1, Putra World Trade Center, Kuala Lumpur, Malaysia.

Sanitary Survey Report o f the Bukit Tampoi Water Treatment Plant, Dengkil, Selangor Darul Lhsan, 1990. Investigations and Special Studies Unit, D ep a r tm en t o f E nv ironm ent , Malaysia, (in Malay).

Standard Methods for the Examination of Water and Wastewater, 1989. Published jointedly by the American Public Health Association (APUA). The Am erican W ate r Works Association (AWWA) and The Water Pollution Control Federation (WPCF), 17th Ed.

Farisha Pawantch. 19‘J I . Sungai Buluh: Pollution and Polluting Sources Inventory. Final Year Research Report, Faculty of Chemical and Natural Resources Engineering. Universiti Teknologi Malaysia, Kuala Lumpur.

Maketab Mohawed. S9S9. Report on the Pollutin Study of Sungai Skudai. Johor Darul T a’zun, Investigations and Special Studies Unit. D epa rtm en t of E nv ironm ent , M alaysia.

a p p e n d i x 1

THIRD SCHEDULEENVIRONMENTAL QUALITY ACT. 1974, ENVIRONMENTAL Q UALITY (SEW A G E AND INDUSTRIAL EFFLUENT) REGULATIONS, 1979[(Regulation 8 (1), 8 (2 ) , 8 (3 ) ]

Parameter limits o f e f f lu e n t s of Standard A and D.

Standard

P a ra m e te r U n it A D

0 ) ( 2) ( 3) (4 )

0 ) T em p trs iu re • c 40 40<>i) pH V alue . 6.0-9.0 5.5-9.0

<>*') e o i) j 2o-c m g/! 20 50(■'•) c o o mg/l 50 100(V) Suspended Solids m g/l 50 100

(**) M ercury mg/l 0.005 0,05(yii) Cadm ium mg/l 0.01 0.02

(viii) C hrom ium . H exavalcn t mg/l 0.05 0.05Arsenic mg/l 0.05 0.10

(* ) Cyanide mg/l 0.05 0.10(* i) Lead mg/l 0.10 0.5

<*") Chrom ium , T n v a te n i mg/l 0.20 1.0(x iii) Copper mg/l 0.20 s 1.0l * ‘v> Manganese mg/l 0.20 1,0(* v> Nickel mg/l 0.20 1,0

(*vi> Tin mg/l 0.20 1.0(*'•"') Zinc mg/l 1.0 1.0

Boren mg/l 1.0 4.0(*i*> Iron t ie ) mg/l 1.0 5.0

Phenol mg/l 0.001 1.0(»*>) Free Chlorine mg/l 1.0 2.0

(*x ii) Sulphiie mg/l 0.50 0.50( « i i i ) on an(j Grease mg/l Nol

Delectable10.0

APPENDIX II

WATER QUALITY C LA SSIFICA TIO N

C L A S S US IIS

Conservation of natural environment Water supply I - practically no treatment necessary (except by disinfection or boil ing only)Fishery I - very sensitive aquatic species

Water supply II - conventional treatment requiredFishery II - sensitive aquatic specics

P r o d d in gS im p os lum S o m be r A la m K e b a n g s a a n P w ta m a (J u la i 1992)fSSA UKM KAMPUS SABAH (MAKCTAB. M, J l l ld 2: 117 ■ H i )

IIB Recreational use with body contact

III Water supply III - extensive treatmentrequiredFishery III - common, of economic value.and tolerant speciesLivestock drinking

IV * Irrigation

V None of the above

Class I represents water bodies of excellent quality . S tandard are set for the conservation of natural environment in its undisturbed states. Waler bodies such as those in the national park areas, fountain-heads, and in high-land and uninhabited areas com e under this category where strictly no discharge of any kind is permitted. Water bodies in this category meet the most stringent requirements ion human health and aquatic life protection.

Class 1IA represents water bodies of good quality, most existing raw water supply sources come under this category. In pratice. no body-contact activity is allowed in these waters for the p revention of transm ission o f probable human pathogens. There is need to introduce another class for water bodies not used for water supply but of similar quality which may be referred to as for class IIB. The determination of Class IIB standards is based on cr i te r ia for rec rea tiona l use and p ro tec tion of sensitive aquatic species.

Class III is defined with the primary objective o f protecting common and moderately tolerant aquatic species o f economic value. Water under this classifiction may be used for water supply with extensive/advanced treatment. This class of water is also defined to suit livestock drinking needs.

Class (V defines water quality required for major agricultural activities which may not cover minor applications to sensitive crops.

Class V represents other waters which do not meet any o f the above uses.

4

PresidingS im p os ium S o m b e r A lo ir i K e b a n g s o a n P a rto m a (J u la i 1992)FSSA UKM KAMPUS SABAH (MAKCTAB, M. J il id 2: 137 - I i t )

AJ’ P K N D IX 111

L IS T O F F A C T O R IE S W IT H IN S U N G A I L A N G A T AND S U N G A I S E M E N Y IH W ATERSHED

F A C T O R Y N A M E A D D R E S S

a d v a n c e d p a c k a g i n g

T E C H N O L O G Y SDN, BH D .

F acto ry B , Lot 2 t Jalan P /24 ,

K aw asan M id

K aw asan P erusahaan B angi.

b i n a m a n u f a c t u r i n g &

CO . b i t u m i x s d n . b h o .Lot 8 98 . M K -C heras , Jajahan

U lu L angat,

cfo K uari Ind. S dn. B hd .,

B atu 19, Ja lan S en ien y ih ,

K ajang.

B O N C E Y MIN DEV. SDN BH D . Lot 1046, M ukim C h era s.

U lu Langat

BU K H A R Y {KL) SD N . BH D . K aw asan P c ru s jlia an I I ,

B andar B aru , Bangi.

C H. (M A L A Y S IA ) SD N . BH D

C A R R IE R IN T E R N A T IO N A L SD N . BH D .

Batu 16 1/4, Jalan Rck<». Kajang,

B andar Baru hangi.

C H E N H IN Y A P PLY W O O D

SD N . BH D .B alu 8, Jin . O ic ra* , K ajang.

C H E N S E O N G CH IN

C O N C R E T E W O RK S.14?, Ja lan R eko, K ajang.

C H EO N G T H O N G (M ) S D N .

BH D . T E T U A N .

L oi 6, Jalan !*• 5B, B andar Baru Dangi.

CH ER A S IN D . SDN. BHD. Baiu 10 1/2. J]ii. Cheras* Kajang.

C H IN H U A T F U R N IT U R E

M FG S SD N . BU D T E TU A N

Lot 26 3 .', M K-ClieruS, Dacrali U lu Langat

C O R R U G A T E D PR O D U C TS

SD N . BH D .

P .T . 4843, B i . 11,

Jalan B alakong . C hera s.

D E C O R W O O D IND. SDN .

BH D .

Balu 16 1/4. Jalan Rcko, Kajang,

DUA SAM A SD N . B H D .

T E T U A N SY A R IK A T

Lot 25, Ja lan 3A,

K aw asan P erusahaan

B alakong , LTlu L angat,

D U PLE X T Y P E L IG H T IN D S. Lot I *8, B alakong , C heras, U lu Langat

E L E C T R IC A L A ND A L L IE D

IN D U S T R IE S BHD.

B andar B aru B ang i, K ajang,

G E N E R A L C O N C R E T E

SDN. BHD.

K aw asan P e ru sah aan B andar

B aru B angi.

FA RIM AN EN T. SDN. BU D . K aw asan P erusahaan B andar

B aru B angi.

H A V Y 'S . K1LANC KF.I.APA

SA W IT.

H IG H P LA IN S EN T E R PR IS E

SDN . BH D.

H ITA C H I CO NSU M ER

SDN . BHD.

HON<j LEE IR O N W O RK S

H U M E B A LK EN (M) SD N .

BHD.

H U M E FO R SED A (M) S D N .

H U M E IN D S. (M ’SIA) BH D.

l l t 'M E R O O R N G TILES SDN. BH D.

JA T IM U R S D N . BHD.

K AJA N G K UA RI SDN. BH D .

K AJA N G P A PER M ILL.

KAR PO H KNITTIN G FA C.

BHD.

K ILA N G K ELU LI

K ILA NG M A TA D AW AI

K IM G U A N H UAT S A W M IL LS

SON . BHD.

K IM IA IN D U STR IES S D N .

BH D.

K IN N 'S C REA M ERIES SDN. BHD.

KONB1NA IN D . SDN. B H D .

KONG PENG RUBBER IN D .

SDN. BH D .

K U A R I, SYK T. M EM ECA H .

S ydney E sta te , S em eny ih .

Lot 22 5 9 . B atu I I 1 /2,

Ja la n C hera s, K ajang

Lot 4, Perindustriao Estate Bangi

No. 4 , J in . B unga T a n ju n g 9 ,

T am an M uda,

C heras, K uala Lunopur.

Plot 709 , Kaw asan Perindustrian

B eranang E s ta te , K ajang .

Lot 4 -9 , K aw asan P erusahaan

B eranang

K aw asan P erindustrian

B eranang E sta te ,

K ajang.

K aw asan P e rin d u s tr ian SD N . B eranang.

Lot P .T . 2 0 7 ,M K -C h e ra s ,

U lu L angat.

K ajang.

S ungai C h u a , K ajang .

Lot 2?. Jalan 34. K awasan SDN

P erin d u strian B alakong ,

43100 U lu L angat.

K aw asan P eru m ah an 176, batu

12. J a la n C h era s. K ajang .

L o t 1007 It 128 ,

B andar B aru B ang i.

S ungai L a lan g . S em coyih .

Sungai C hua, K ajang .

L ot 11, K aw asan P erusahaan B a lakong , K ajang

Lot 1007 & 128, B andar Baru

B ang i, B ang i.

L o t T ap ak N o . 30 , Ja lan 1,

K aw asan P erin d u s trian

B a lak o n g , K ajang .

B atu 18, Ja lan S em eny ih ,

K ajang

4

Pro s id in gSimposiuf't Sun)b0 r A lam K e b a n g s a o n P w to m a (Ju la i 1992) FSSA UKM KAMPUS SABAH (M AKCTAB, M , J l l ld 3 : 1S7 - H i )

K W A N G FO i O N N $A W M !L L

SD N . BH D.

LADANCt SU N G A I R IN C H IN G

l e a s c o M a l a y s i a s d n .

B H D ./N A R iS A N A LA M SB.

L E E C H IN C H E N G . K II.A N G

s a w i t .

L E E Y EN (CEE SM R FA C T O R Y

LIA N A N N T R A D IN G , SY K T.

LI A N N G O I IN D U S T R IE S

SD N B U D .

LO N T A I C H E M IC A L IN D .

CO . (M ) SDN . B H D .

M A L A Y S IA T O P M A K IN G

M IL L S S D N BH D .

M .T . A G R O IN D S. ENG.

SD N B H D

M A L A Y A PINE S D N . BH D .

M A L A Y S IA N IN D S. EST .

S D N BH D T E T U A N

M A R D E C U L U LA N G A T

M A T SU SH IT A E L E C T R IC CO

SD N B H D

M E A T M A N U FA C T U R E S

SD N BHD

N E W EN G IN E E R IN G SDN

BH D

OTM.MAN & A M A T B . IIA SS A N

P L A ST IC T E R IC (M ) SD N .

BH D . PRAN G B E S A R ES T A T E

Q U A R R Y IN D . SD N . B H D .

REA D Y M IX E D C O N C R E T E

M A L A Y SIA S D N . BU D.

R E N O W A IN D U S T R IE S (M j SDN . B H D

R IS D A , B A IIA G IA N T A N A M SEM U L A .

N o 2 . Ja lan S ungai C hua.

K ajang

Scliicny ill

Lot 2297 , G eran 6 0 7 9 . K ajang

Batu 2. Ja lan D cngk il/K ajang

874 , J in . W on S iow ,

S g. C liua, K ajang

340. B atu 16, J a la n R eko .

K ajang

Lot 4, Ja lan S a iu , K aw asan P erindusirian B alakong ,

U tu L angat.

Lot 3. L orong P /IB , K aw asan

P erindustrian B ang i.

B atu 23 , Jalan K achan,

43500 S em eny ih .

K aw asan IV rusahaan . B andar

Baru B a n g i.

Bangi

K aw asan M id . B angi F asa II

Bangi

Baiu 12. UUs L angat.

Jalan P ! . P2 A P 2A . Bangi (M )

Industria l E sta te.

K aw asan P erin d u sirian E sta te .

M ie l. Bangi.

Lot 37 , Ja la n 3A , K aw asan

P erusahaan , B alakong ,

43100 U iu L anga t.

6 7 7 6 , Lot 4 3 3 7 , M K -D engkil

K aw asan P erin d u s trian B ang i

B atu !0 1/2, J a la n D engkil- K ajang. K ajang .

Batu 19. Jalan S em eny ih ,

K ajang.

U niversiti Kehangsaan M alaysia.

B ang i. K ajang.

Ltd 23, Jalan 3 A . K aw asan

P erusahaan B a lak o n g ,

Ulu L angat.

M akrnal K ecerak inan T anah A

D edaun. B ang i

RU M PU N H IJA U S D N . B H D .

SY A R IK A T

S E L A N G O R C O T T O N T O W E L S

M FG S S D N . BH D.

S E L A N G O R G R A N IT E K U A RI

B H D ..

S IN C H IIA N AIK SD N . B H D .

SIO N G H O E K IL A N G PA PA N .

SO U TH EA ST A SIA [NO

SDN . BH D.

SRI IO H A N ! SD N . B H D

SRI K A JA N C RO C K PUTS

<M) S D N B IIIJ

STEE L SERV ICE C E N T R E (M j SDN . BH D.

SU M W O H SA W M IL L.

T A I KW ONO B A TTE R Y IN D S.

SDN . BHD.

T A IT A T K N IT TIN G FA C T O R Y

SD N BHD

TO S H IB A (M j B H D

TU N A JA V A SUN . B il l )

U N IT E D C O N C R E T E W O R K S

C O N S T R U C T IO N CO .

W A TTA BA TTERY IN D U S T R IE S

SD N BH D.

W A T T A B A IT E R Y IN D U S T R IE S

SD N BUD.

W E S T C O U N T R Y EST A T E

SD N . BH D.

YAM TE N G K U B A D L I SH A H

Y A P O i l & SONS SDN . B H D

YU EE T E X T IL E IN D U S T R IE S

SD N . BH D.

K aw asan Perindustrian Pertam a,

Jalan P/1 A , B andar B are Bangi.

Batu 1 ] , Cheras, Jalan Balakong,

43 2 0 0 K ajang .

Batu 10 1/2, Jaiatt C heras, SDN.

K ajang .

B atu 8, J a ia n C heras.

B atu 10 1 /2, Ja lan C h e ra s ,

K ajang.

Lot 33. Ja lan 3A. B alakong, U lu

L angal.

L ot F T . 7178 (B a lakong New

V illag e),

57 0 0 0 M K -C heras .

Batu 20 , B angi Industrial Estate,

B ang i, K ajang .

Lot 20, Bangi Industrial Estate,

B ang i, K ajang .

N o. 6 . Ja lan R cko. K ajang .

Lot 7, Ja la n I , K aw asan

P erusahaan B alakong , C hera s,

Lot 1 1 A , Ja la n 3A , B a lakong

•*3200 l^Lu L anga t.

B andar B aru B angi

Jaiatt 1VU. K aw asan Perusahaan

P eringka t , B andar B angi.

B aiu 12, Ja lan C h era s, K ajang.

l.ril 6, J a la n 1, K aw asan

P eru sah aan B alakong ,

43000 K ajang.

Lot 4, Ja lan Q u arry , K an tpong

C heras B aru , O ff Ja la n C hera s.

K ajang

M K -Ju g ra . U lu L anga t

63 B aiu 14, Ja lan C hera s,

K ajang.

B aiu 11, Ja lan C h e ra s . 43000

K ajang.